#!/bin/sh

get_int() { # Type of interface & status
    # If active ethernet, just exit with icon
    grep -xq 'up' /sys/class/net/e*/operstate 2>/dev/null && echo "󰛳" && return 0

    # If active WiFi, print link strength
    if grep -xq 'up' /sys/class/net/w*/operstate 2>/dev/null ; then
        strength="$(awk 'NR==3 {printf("%.0f\n",$3*10/7)}' /proc/net/wireless)"
        case 1 in
            $((strength >= 100)) ) bar="━━━━━━━━━━" ;;
            $((strength >= 90))  ) bar="━━━━━━━━━─" ;;
            $((strength >= 80))  ) bar="━━━━━━━━──" ;;
            $((strength >= 70))  ) bar="━━━━━━━───" ;;
            $((strength >= 60))  ) bar="━━━━━━────" ;;
            $((strength >= 50))  ) bar="━━━━━─────" ;;
            $((strength >= 40))  ) bar="━━━━──────" ;;
            $((strength >= 30))  ) bar="━━━───────" ;;
            $((strength >= 20))  ) bar="━━────────" ;;
            $((strength >= 10))  ) bar="━─────────" ;;
            $((strength >= 0))   ) bar="──────────" ;;
        esac
        echo "󰖩 $bar"
        return 0
    fi

    # If down interfaces, exit with icon
    grep -xq 'down' /sys/class/net/w*/operstate 2>/dev/null && echo "󰖪 ──────────" && return 0
    grep -xq 'down' /sys/class/net/e*/operstate 2>/dev/null && echo "󰲛" && return 0
}

get_net() {
    # Run 'int'
    info=$(get_int)
        
    # Check if a VPN is enabled
    vpn="$( \
        sed "s/.*//" /sys/class/net/tun*/operstate 2>/dev/null
        sed "s/.*//" /sys/class/net/wg*/operstate 2>/dev/null \
        )"
    # If so, change icon
    [ -n "$vpn" ] && info="$(printf "$info" | sed 's/󰛳//' | sed 's/󰖩//')"

    # Print $info
    printf "%s" "$info"
}

get_vol() {
    vol=$(amixer | grep "Playback" | grep -o '[0-9]*[0-9]%' | head -n 1)
    vol="${vol%\%*}" # Remove percentage sign

    if amixer scontents | grep "Playback" | grep -q "\[off\]"; then
        echo "󰖁 ──────────"
        exit
    fi

    case 1 in
        $((vol >= 100)) ) bar="━━━━━━━━━━" ;;
        $((vol >= 90))  ) bar="━━━━━━━━━─" ;;
        $((vol >= 80))  ) bar="━━━━━━━━──" ;;
        $((vol >= 70))  ) bar="━━━━━━━───" ;;
        $((vol >= 60))  ) bar="━━━━━━────" ;;
        $((vol >= 50))  ) bar="━━━━━─────" ;;
        $((vol >= 40))  ) bar="━━━━──────" ;;
        $((vol >= 30))  ) bar="━━━───────" ;;
        $((vol >= 20))  ) bar="━━────────" ;;
        $((vol >= 10))  ) bar="━─────────" ;;
        $((vol >= 0))   ) bar="──────────" ;;
    esac

    echo "󰕾 $bar"
}

get_mic() {
    vol=$(amixer | grep "Capture" | grep -o '[0-9]*[0-9]%' | tail -n 1)
    vol="${vol%\%*}" # Remove percentage sign

    if amixer scontents | grep "Capture" | grep -q "\[off\]"; then
        echo " ──────────"
        exit
    fi

    case 1 in
        $((vol >= 100)) ) bar="━━━━━━━━━━" ;;
        $((vol >= 90))  ) bar="━━━━━━━━━─" ;;
        $((vol >= 80))  ) bar="━━━━━━━━──" ;;
        $((vol >= 70))  ) bar="━━━━━━━───" ;;
        $((vol >= 60))  ) bar="━━━━━━────" ;;
        $((vol >= 50))  ) bar="━━━━━─────" ;;
        $((vol >= 40))  ) bar="━━━━──────" ;;
        $((vol >= 30))  ) bar="━━━───────" ;;
        $((vol >= 20))  ) bar="━━────────" ;;
        $((vol >= 10))  ) bar="━─────────" ;;
        $((vol >= 0))   ) bar="──────────" ;;
    esac

    echo " $bar"
}

get_bat() {
    total=0
    batteries=0

    for battery in /sys/class/power_supply/BAT?* ; do
        capacity=$(cat $battery/capacity 2>/dev/null || break)
        total=$((capacity+total))
        batteries=$(($batteries+1))
    done

    [ $total -gt 0 ] && bat=$(($total/$batteries)) || bat="󰚥"
    [ "$bat" = "󰚥" ] && echo "$bat" && exit
    grep -rq 'Charging' /sys/class/power_supply/BAT* 2>/dev/null && stat='Charging'

    case 1 in
        $((bat >= 98))  ) bar="━━━━━━━━━━" ;;
        $((bat >= 90))  ) bar="━━━━━━━━━─" ;;
        $((bat >= 80))  ) bar="━━━━━━━━──" ;;
        $((bat >= 70))  ) bar="━━━━━━━───" ;;
        $((bat >= 60))  ) bar="━━━━━━────" ;;
        $((bat >= 50))  ) bar="━━━━━─────" ;;
        $((bat >= 40))  ) bar="━━━━──────" ;;
        $((bat >= 30))  ) bar="━━━───────" ;;
        $((bat >= 20))  ) bar="━━────────" ;;
        $((bat >= 10))  ) bar="━─────────" ;;
        $((bat >= 10))  ) bar="──────────" ;;
    esac

    [ "$stat" != "Charging" ] && icon="󰁹" || icon=""
    echo "$icon $bar"
}

get_layout() {
    layout="$(swaymsg -t get_inputs | grep -m 1 'xkb_active_layout_name' | cut -d '"' -f 4)"
    [ "$layout" = "English (US)" ] && layout="us"
    [ "$layout" = "Spanish (Latin American)" ] && layout="la"
    echo "󰌌 $layout"
}

get_apts() {
    apts="$(calcurse -a | grep -c '\*')"
    [ "$apts" = "0" ] && return 0
    echo "󰃭 $apts"
}

get_todo() {
    todo="$(calcurse -t | wc -l)"
    [ "$todo" = "0" ] && return 0
    echo " $todo"
}

while true ; do
    status=""
    separator="    "

    todo="$(get_todo)"
    ! [ -z "$todo" ] && status="$status$separator$todo"

    apts="$(get_apts)"
    ! [ -z "$apts" ] && status="$status$separator$apts"

    volume="$(get_vol)"
    ! [ -z "$volume" ] && status="$status$separator$volume"

    microphone="$(get_mic)"
    ! [ -z "$microphone" ] && status="$status$separator$microphone"

    network="$(get_net)"
    ! [ -z "$network" ] && status="$status$separator$network"

    battery="$(get_bat)"
    ! [ -z "$battery" ] && status="$status$separator$battery"

    layout="$(get_layout)"
    ! [ -z "$layout" ] && status="$status$separator$layout"

    date_time="$(date "+%I:%M%p$separator󰃮 %a %Y-%m-%d")"
    ! [ -z "$date_time" ] && status="$status$separator󰥔 $date_time"

    printf "%s\n" "$status"
    # exit 0 # Testing
    sleep 0.4
done